Three knee replacements? But I only have two knees!

Time to Recuperate

Anyway, both surgeries seemed to have gone quite well, and I worked hard at the physical therapy part of the program. The bottom line is that my wife and I have been able to do a lot since the surgeries that would have been otherwise impossible before. Activities have included:

Okay, so this is knee replacement #3 for me! Both knees had been replaced in 2017, one in August and the other in October. The operations seemed to have both been a success. My surgeon had been a missionary companion in Paris 50 years ago (“missionary companion”: missionaries for our church are always assigned in teams of two). He had an excellent, international reputation with the clinic that bears his name: Rosenberg Cooley Metcalf Orthopedic Clinic of Park City, Utah. He is the Rosenberg part of the name. Their clinic has treated lots of professional and Olympic athletes, with Tiger Woods having been one of those. Tom’s specialty was knees.

  1. A six-month mission for our church at the Visitors’
    Center at the new Paris Temple in 2018,
  2. Eight weeks in France last year. We went for the
    celebration of the 75th Anniversary of D-Day and stayed on until the wedding of
    a friend on 26 July, with a wonderful 10 days in Italy coming towards the end,
    and
  3. Lots of activities with our 21 grandkids, who
    work hard to keep us young!

It is important to recognize that we never would have been able to do all we have without the surgeries.

Nevertheless, the situation with the left knee (second replacement) has never been quite right, and we don’t really know what has caused the problems. I began seeing the surgeon again following our trip to France last year. Rosenberg’s replacement (a really young guy!) determined that there was a great deal more play in the left knee than in the right. He suggested as a first step more physical therapy to try to compensate for the looseness. As I learned about what helped, I added new exercises to the exercises and stretches I had been doing since the first surgeries. Specifically, the thing that seemed to help the most were strengthening exercises with an exercise ball between my back and the wall for partial, squats. As time passed, however, it became clear that something more had to be done.

The surgeon was hopeful that the simple replacement of the polyethylene spacer between the tibial and femoral components would do the trick. To have a better idea as to what to expect when he got in there, he ordered up a bone scan (skeletal scintigraphy with intravenous radioactive tracers). This revealed inflammation below the tibial components in each knee, but there was much more inflammation present in the left knee than the right. Combining that evidence with X-Rays, he told me that we needed to anticipate the possibility of a Plan B (replacement of the tibial component as well as the spacer) or even Plan C (a changeout of the whole shooting match and adding a posterior stabilized prosthesis by Stryker. When I explained these various possibilities to our kids, our oldest son said, “Pops, if none of those three works, there is always Plan D: A peg leg and a parrot!” ?

When the doc got in there, however, he discovered that things were in some ways worse than he had anticipated. The metal protection added to the back of the patella was attached by only one of the three connective elements to the point that it could be spun in place. The polyethylene spacer was worn on one side, so bad as “it could have come from a knee where it had been in place for 20 years.” Was this uneven wear due to errors in the angles of bone cuts and placement upon initial replacement? Was it caused by an unfortunate occurrence just after I returned home, the CPM machine had fallen over in bed, twisting my knee something fierce? The surgeon and his PA were adamant back then that this would not be a problem. The new surgeon told me that he could not assert that the CPM machine tipping over was not the cause!

So, here I am recovering from TKA #3! My wife just said a few minutes ago, “I cannot get over how much easier this one is compared with the first two.” No doubt some of the difference has to do with changes in anesthesia: a spinal block and then a femoral block that lasted several days. This gets the patient past the early pain. The anesthesiologist said I could stay awake and watch if I wanted. I am not sure he was serious, but I declined and was happy when they squirted the sleep-inducing drug into my IV and then woke up in the recovery room, totally oblivious to the fact that four hours had passed.

Another possibility to explain how comparatively easy this one was is the fact that the muscles in my leg were already accustomed to dealing with a prosthesis. Of course there is the trauma of opening up the knee, pulling out the old, and inserting the new and then putting it all back together again and sewing it up (They used internal, dissolvable sutures this time rather than the gruesome looking staples from the first time around.). That said, things are going so much better this time around that the difference is rather astounding.

So, I know that you are not excited about having to go through the experience again, but I can assure you that there is every reason to believe that things will be better for you this time around! It is amazing the miracles these surgeons can pull off and they keep getting better at it!

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Raspberry Pi 4 Announced

The Raspberry Pi Foundation recently announced the Raspberry Pi 4. The little, single-board computer has been an incredible development from the beginning, but the newest edition has now crossed what I believe to be an important threshold. For starters, the Raspberry Pi 4 now runs at 1.5 gigahertz instead of 1.4. This is nothing to sniff at, but other feature improvements such as more memory, the USB upgrade, and faster Ethernet are even more significant.

Raspberry Pi 4 Image and Description
The new Raspberry Pi 4 and key new features

For example, the maximum memory available on previous versions was 1 GB, but 1 GB, 2 GB, and 4 GB configurations will be available. The Raspi 4 maintains the same form factor and its layout is quite similar, with four USB ports still available. Two of those are USB 3.0, thus increasing data input and output by a factor of 10. That improvement, along with the full-speed gigabit network connection, turns the little unit into a more than adequate core of a network-attached storage (NAS) system.

The graphics processor not only supports 4K output, it can drive two monitors through its two mini-HDMI ports. It supports one 4K monitor at 60 frames per second (FPS) and two and two at 40 FPS.

The basic price point of $35 still applies, but increased memory size will understandably increase the price to $55 for the 4 GB version.

Incredible!

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The Trump “Dossier”

A friend’s post on Facebook this weekend expressed their appreciation for a sign at the Women’s March they attended, which stated: “Golden showers bring impeachment flowers.”

I responded, “Perhaps those flowers will be no more real than the made-up showers? Folks might want to put their hopes in something more substantial than some bogus ‘dossier.'”

My friend responded that Breitbart News and Fox News were the only news outlets to label it as bogus, which I chalk up as more a negative reflection on the state of journalism in the US than anything else. Nevertheless, this prompted me to do a bit more research.

The first source I came across was from Forbes and was entitled “The Trump Dossier Is Fake — And Here Are The Reasons Why.” It was written by Paul Roderick Gregory, a visiting fellow at the Hoover Institution, which provides his bio here. Based on his experience and publications, my assessment is that he is certainly qualified to analyze the “dossier,” of which he asserts, “The poor grammar and shaky spelling plus the author’s use of KGB-style intelligence reporting, however, do not fit the image of a high-end London security company run by highly connected former British intelligence figures.” He comments on the overall nature and effect of the document :

We have reached a sad state of affairs where an anonymous report, full of bizarre statements, captures the attention of the world media because it casts a shadow over the legitimacy of a President-elect, who has not even taken the oath of office. For example, the Trump dossier is tonight’s lead item on German state television and on BBC. False news has become America’s international export to the world media. [Bold face added by me for emphasis] 

The writer mentioned the denial of Trump’s attorney, Michael Cohen, that he had traveled to Prague as stated in the “dossier,” but he failed to provide additional information that was available from other sources. Specifically, DailyMail.com reported on 11 January that CNN had concluded that the Michael Cohen who had gone to Prague was a different Michael Cohen than the one who is Trump’s attorney. In fact, it was Jake Tapper of CNN whose reporting led to that conclusion, and his comments are available here on his Twitter feed.

This reporting of course adds to the speciousness of the document, and when taken with Professor Gregory’s comments, suggests that this thing is one big pile of nonsense as Trump claimed from the beginning. As to my friend’s comment to me that the CIA took the report seriously and briefed “Trump and the Obama administration a couple of months ago,” I don’t see how that adds to the credibility of the document. Indeed, a report in the Washington Post in no way draws that conclusion.

P.S.

Regarding the fact that only Breitbart and Fox have supported Trump in this matter, my conclusion is that this is a simple reflection of bias against Trump. One only has to look at the coverage of the UK tabloid DailyMail.com to get a sense of the other side of the story. Do this search on Google (site:www.dailymail.co.uk trump dossier) for an idea of what else is being said. And don’t think that the Mail’s conservative bias has turned them into Trump sycophants, given that, as reported by the BBC, Melania Trump brought suit against them and a blogger for writing that she had served as an escort in the 1990’s. They have since retracted that claim.

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Blackboard vs Canvas vs Moodle

A colleague at another university, which is contemplating a move to one of these four learning management systems, wanted to know the preferences from among this list of systems:

Here is my reply:

BYU was a huge Blackboard user for several years, before deciding to develop their own LMS

BYU was a huge Blackboard user for several years, before deciding to develop their own LMS (BYU Learning Suite). The decision to build one’s own system was not one that I supported, but given Blackboard’s exorbitant cost, I totally understood the motivation.

That said, in the lab I directed before retirement we implemented Moodle on a couple of projects. We have also worked with Canvas and even received an award a couple of years ago from Instructure for our implementation of LTI (Learning Tools Interoperability) with Ayamel.

Canvas and Moodle each have advantages. There is a large community of Moodle users, but we found certain functionality lacking. The fact that it is free is also a bit misleading, given that a particular shop is on its own for the system’s implementation. Yes, there is a community of users “out there” to help, but the system still requires an in-house support capability when technical issues arise.

You have probably done your searching, but I just came across this piece that compares Blackboard, Canvas, and Moodle. Blackboard comes in third place, and Canvas edges out Moodle, but only very slightly.

To me the key factors lie with a concept a colleague and I wrote about here and labeled “tool and content malleability.” A key aspect of this is LTI a capability that both Canvas and Moodle have to some degree, Thus it all comes down to the level of technical support you can expect at your institution.

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